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A Novel Angiosperm from the Early Cretaceous and Its Implications for Carpel-Deriving 被引量:2

A Novel Angiosperm from the Early Cretaceous and Its Implications for Carpel-Deriving
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摘要 The Yixian Formation (Lower Cretaceous) of China is famous for its fossils of early angiosperms, and these fossils have shed otherwise unavailable light on the evolution of angiosperms. The seeds in Archaefructus and Nothodichocarpum are inserted along the dorsal of the fruits while those in Sinocarpus are along the ventral of the fruits, suggesting different Bau-plans and pathways deriving the carpels in these plants of the Early Cretaceous. Adding further fossil evidence, here we report a novel fossil angiosperm, Neofructus lingyuanensis gen. et sp. nov, with its seeds inserted on both ventral and dorsal sides of the fruits documented through light microscopic and SEM observations, suggesting a novel way forming gynoecium in the Yixian Formation. These fossil angiosperms indicate that angiosperm gynoecia in the Yixian Formation (the Barremian to Aptian) are derived in obviously different ways, implying an evolutionary scenario for angiosperms quite different from formerly assumed. The Yixian Formation (Lower Cretaceous) of China is famous for its fossils of early angiosperms, and these fossils have shed otherwise unavailable light on the evolution of angiosperms. The seeds in Archaefructus and Nothodichocarpum are inserted along the dorsal of the fruits while those in Sinocarpus are along the ventral of the fruits, suggesting different Bau-plans and pathways deriving the carpels in these plants of the Early Cretaceous. Adding further fossil evidence, here we report a novel fossil angiosperm, Neofructus lingyuanensis gen. et sp. nov, with its seeds inserted on both ventral and dorsal sides of the fruits documented through light microscopic and SEM observations, suggesting a novel way forming gynoecium in the Yixian Formation. These fossil angiosperms indicate that angiosperm gynoecia in the Yixian Formation (the Barremian to Aptian) are derived in obviously different ways, implying an evolutionary scenario for angiosperms quite different from formerly assumed.
出处 《Acta Geologica Sinica(English Edition)》 CAS CSCD 2018年第4期1293-1298,共6页 地质学报(英文版)
基金 supported by the Strategic Priority Research Program (B) of Chinese Academy of Sciences(XDB26000000) National Natural Science Foundation of China (91514302, 91114201) awarded to X.W. State Forestry Administration of China (No. 2005–122) Science and Technology Project of Guangdong (No. 2011B060400011) Special Funds for Environmental Projects of Shenzhen (No. 2013-02) awarded to Z. J. L.
关键词 ANGIOSPERM Neofructus GYNOECIUM Yixian Formation Early Cretaceous LIAONING angiosperm Neofructus gynoecium Yixian Formation Early Cretaceous Liaoning
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